HP ProBook 4540s Battery Replacement - iFixit Repair Guide
Genuine 633805-001 PR06 Battery for HP ProBook 4540S 4530S 4440S 4430S 4540S
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Synergy Digital Laptop Battery, Compatible with HP ProBook 4540s Laptop, (Li-ion, 11.1V, 4400mAh) Ultra High Capacity, Replacement for HP PR06 Battery - Walmart.com
HP ProBook 4540s 6-Cell Replacement Battery
HP ProBook 4540 4540s 4545s Battery PR06 QK646AA 633805-001
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Battery suitable for HP ProBook 4540s - 6600 mAh 11.1 V battery (Black) - BatteryUpgrade
Hp ProBook 4540s 10.8V 47Wh 6 cell Replacement Laptop Battery
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